| Category | Structures |
| Continent | Brucrumus |
| Region | Grashakh |
| Built | 3 War March 1751 |
| Map | Mirtheon |
In the Core Offensive (1749 - 1760), the Orchish Empire built an upland canal from lake Virgath to the Mazgob swamp. After work was done on the Vigath-Mazgob Canal, channels were dredged through this swamp and then along the river Irudrarg. By 1759, the empire's young navy were sailing the Core Sea.
At the canal's southernmost end is the city of Hrornskar. Long a poor city, the canal made it a busy lake port. A news piece of the time said:
To many onlookers, the growing number of ships filling the area, vessels more suitable for large seas, is confounding. Dockyard workers talk of foreigners, skilled shipwrights, coming in from faraway places like Paradomea City, and those nearer like Blackjammer. They don't say, but we know what the High Command is up to. They want a piece of the Core Sea. Commerce beyond land routes is good, but is the real reason to threaten our northern neighbors, the Khazarkar Empire, with both land and sea attack?
- Etrat - half-orc reporter of the Collossapolos Daily - "The VM Canal"
The canal is very wide in parts. These areas are the result of sabotage by Quellestir's natives. In their war with the Orchish Empire, Forstneblin collapsed the canals, draining them into tunnels and then into the deeps below. After the Core Offensive, the Orchish Empire gave up claims to the land corridor running through Quellestir. Party to the Treaty of Quellestir, the Forstneblin stopped their sabotage and other hostilities to traffic on the canal. Since that time, benefiting from greatly increased trade, villages and towns have popped up along the canal to the sea.